JP2001012107A - Working method of fitting seat of base isolation device and base isolation base plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the working method of the fitting seat of a base isolation device and the base isolation base plate using thereto easy in handling and efficient in productivity with simple members and the construction using the members. SOLUTION: The working method of the fitting seat of a base isolation device and the base isolation base plate 3 is provided with screw holes 11 for fixing the base isolation device to the one side surface of the fitting parts of the base isolation device; and the base isolation base plate 3 is directly fixed to the foundation making part of a plurality of fixing bolts 14 provided to the fitting parts 10 of the base isolation device of level adjusting struts 6 of the base isolation base plate 3. The other fixing bolts 14 are released from the foundation, so that the reduction in use materials and the enhancement in productivity due to simplification of level adjusting work can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a base for mounting a seismic isolation device which can be easily constructed with simple members and configurations, and a seismic isolation base plate used therefor.

[0002]

2. Description of the Related Art Although there are differences in the size of recent buildings, most of the buildings house electronic computers, office automation equipment, and various communication devices as indispensable facilities in the information society. For this reason, as a countermeasure against earthquakes, there is a strong tendency to consider that these important facilities will not be destroyed by the earthquake as well as the soundness of buildings, especially in facilities with high publicity such as firefighting / police, broadcasting / telephone and hospitals. Since it is expected that various electronic devices will be operated stably during a disaster, it is important to protect facilities including these various devices from earthquakes.

[0003] In order to protect electronic equipment, important equipment and valuables housed in buildings and inside from damage caused by earthquakes, the policy of switching from a conventional seismic structure to a seismic isolation structure is being rapidly promoted. Not only buildings, but also many buildings adopt seismic isolation structures in order to extend the life of buildings by adopting retrofit technology.

In the seismic isolation method, a seismic isolation layer provided with a seismic isolation device is provided at the lower part of the building to reduce the seismic force applied to the building body above the seismic isolation layer during an earthquake. is there. For the construction of the seismic isolation layer, a base for mounting the seismic isolation device is provided on the foundation, and the upper building is constructed for the seismic isolation device mounted on the mounting base.

FIGS. 6 and 7 show how a mounting base is constructed when a conventional seismic isolation layer is constructed. In the drawing, 30 is a foundation, 31 is a reinforcing steel bar of concrete forming a mounting base of the seismic isolation device, 32 is an anchor frame, 33 and 33 'are base isolation base plates, and 34 is a constructed isolation line shown by a virtual line. A mounting base for the seismic device, and 35 is a seismic isolation device. The setup streaks 36 are buried in a state of being implanted in a direction perpendicular to the foundation. Setup line 36
Are installed at four predetermined positions when the foundation concrete is poured in order to install the anchor frame 32. After the concrete is placed, the anchor frame 32 for connecting the seismic isolation base plate is welded. It is used for fixing with.

As shown in a plan sectional view of FIG. 7, the anchor frame 32 is formed in a rectangular shape in plan view by welding a rectangular assembly of an L-shaped angle member 37 and welding it. A protruding piece 38 of a predetermined length is welded to the side. In the anchor frame 32, eight screw holes are circumferentially arranged at uniform intervals with respect to the center of the anchor frame as shown.

The seismic isolation base plates 33, 33 'are provided with screw holes for attaching the seismic isolation device 35 on one side. On the opposite side, a long nut is welded to the screw hole for attaching the seismic isolation device 35, and one end of a screw rod 39 is screwed to the long nut. The screw rod 39 and the nut 40 provided at the other end are connected to the anchor frame 32 to perform position setting and level adjustment of the base isolation base plate 33.

The seismic isolation base plate 33 is fixed by the nut 40 while engaging all the above-mentioned screw rods 39 with the anchor frame 32 fixed to the foundation 30 and adjusting the level. Thereafter, a predetermined formwork is placed around the concrete reinforcing steel bar 31, concrete is poured, and the mounting base 3 of the seismic isolation device 35 is displayed in a virtual line.
4 are formed. When the mounting base 34 is formed, the seismic isolation device 35 is placed on the mounting base 34 and fixed by bolts. Further, on the upper surface of the seismic isolation device 35, a seismic isolation base plate 33 'fixed to the upper building is attached, and a seismic isolation layer is formed in accordance with the construction of the upper building.

[0009]

As described above, the conventional construction method for constructing a seismic isolation layer employs an anchor frame for setting a position and a setup bar for the anchor frame. Many members are used and complicated construction is performed, such as planting, positioning of seismic isolation base plate and level setting using anchor frame and screw rod, and in order to build a mounting base A long construction period was spent, resulting in increased costs and inefficient productivity.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a simple mounting member and a quick construction using the same. The task is to provide a construction method for bases and provide base-isolated base plates for use.

[0011]

According to a first aspect of the present invention, there is provided a method of constructing a base for mounting a seismic isolation device, wherein a screw hole for fixing the seismic isolation device is provided on one surface of a mounting portion of the seismic isolation device, and an opposite surface of the mounting portion. A seismic isolation base plate having a plurality of anchor bolts screwed into the screw holes is fixed to a foundation, and then concrete is cast under a predetermined formwork. A part of the plurality of anchor bolts provided in the seismic isolation device mounting part is used as a level adjustment support of the base isolation base plate, and the base isolation plate is directly fixed to the foundation, and the other anchor bolts are released from the foundation. ,
Productivity is improved by reducing the number of members used and simplifying level adjustment work.

According to a second aspect of the present invention, there is provided a seismic isolation base plate for use in the method of constructing a base for mounting a seismic isolation device according to the first aspect. It is characterized in that a hole is provided, and a plurality of fixing bolts provided by being screwed into the screw holes are provided on the opposite surface of the base plate, and a part of the plurality of fixing bolts is used as a level adjustment support for the base, It can be manufactured at a low cost with a simple structure.

According to a third aspect of the present invention, there is provided the base-isolated base plate according to the second aspect, wherein the base-isolated base plate includes a plurality of fixing bolts arranged in a circumferential shape and stably fixes the base-isolated base plate. The fixing bolt positioned as described above is characterized in that it is used as a level adjustment support for the foundation, thereby stabilizing the level adjustment and facilitating handling.

According to a fourth aspect of the present invention, there is provided the seismic isolation base plate according to the second aspect, wherein the seismic isolation base plate includes a plurality of fixing bolts arranged in a polygonal shape and has three or more points for stably fixing the seismic isolation base plate. The fixing bolts located at the corners of the base are characterized by being used as a level adjustment support for the base-isolated base plate with respect to the foundation, thereby stabilizing the level adjustment and facilitating handling.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a method of mounting a base for mounting a seismic isolation device according to the present invention, a screw hole for fixing a seismic isolation device is provided on one surface of a mounting portion of the seismic isolation device, and the screw is provided on an opposite surface of the mounting portion for the seismic isolation device. Some of the anchor bolts screwed into the holes are used as level adjustment columns for the base-isolated base plate and the base plate is directly fixed to the foundation, and other anchor bolts are released from the foundation to improve productivity. ing. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show the construction of a mounting pedestal equipped with a seismic isolation device. The concrete of the mounting pedestal, the seismic isolation device to be equipped, and the seismic isolation base plate attached to the upper building are shown. Is omitted because it is the same as the conventional example. In the figure, 1 is a foundation, 2 is a concrete reinforcing steel bar forming a mounting base of the seismic isolation device, 3 is a seismic isolation base plate, and 4 is a fixing plate of the seismic isolation base plate 3. The seismic isolation base plate 3 uses three fixing bolts selected from among a plurality of fixing bolts 14 screwed on one side in consideration of stable fixing as the level adjustment columns 6. The level adjustment support 6 is provided with anchor bolts 5 on the foundation.
And is fixed by welding or the like.

The concrete reinforcing bars 2 forming the foundation 1 and the mounting base 7 of the seismic isolation device are substantially the same as those of the conventional example, and therefore the description is omitted. There is no setup line for fixing the anchor frame. Therefore, it is not necessary to perform the operations such as blackout for positioning the setup streaks and fixing of the foundation concrete to the reinforcing bars, and the foundation work is greatly simplified as compared with the conventional example.

Three fixing plates 4 are arranged at predetermined positions on the foundation 1. Since the positioning of the fixing plate does not require any special precision, it can be performed by a simple operation. In the present embodiment, the anchor bolts 5 are used to fix the fixing plate 4, but the anchor bolts 5 need not be firmly fixed to the reinforcing reinforcing bar of the foundation by welding or the like.

That is, since the fixing plate 4 only temporarily receives the vertical load of the base-isolated base plate 3 and does not receive a shearing force, it is sufficient to simply work the concrete after placing the foundation 1 in concrete. Very simple means of fixing the anchor bolts 5 using other conventional means are sufficient.

In the partial view of FIG. 3, a part of the seismic isolation base plate is cut away for easy understanding, and the setting state of the seismic isolation base plate 3 is shown. The base-isolated base plate 3
As will be described later, three fixing bolts selected from among a plurality of fixing bolts 14 screwed to one surface of the seismic isolation device mounting portion 10 in consideration of stable fixing are used as the level adjustment columns 6. The level adjusting column 6 in FIG. 3 is shown in its entirety by removing a part of the seismic isolation base plate and removing the fixing bolt 14, and is supported by the fixing plate 4 fixed on the foundation with the anchor bolt 5. It is fixed to the fixing plate 4 by welding or the like. The level adjustment support 6 is the seismic isolation device mounting part 1
No. 0 is screwed into a projection 13 provided on one side, and a retaining nut 16 and a locking stopper 17 for strengthening the coupling force between the setting nut 15 and the cast concrete are screwed.

The level adjustment column 6 is mounted on a fixing plate 4 having its tip fixed on a base, and the position of the seismic isolation base plate 3 is marked on the fixing plate 4. Will be installed. At the same time, the level of the seismic isolation base plate 3 is adjusted by turning the level adjustment support 6, and after setting the seismic isolation base plate 3 to a predetermined height, the height is determined by the setting nut 15. To level adjustment support 6
Is fixed by welding or the like to complete the setting of the base-isolated base plate 3. At this stage, the other fixing bolts 14 are in an open state without being restrained by the foundation 1, but are firmly restrained by the following cast concrete, and the seismic isolation device provided with the base isolation base plate 3 is installed. The strength as a pedestal has been secured.

Thereafter, a predetermined formwork is placed around the concrete reinforcing bar 2 and then concrete is cast to form a seismic isolation device mounting base so as to be indicated by a virtual line, as in the conventional example. It is. A seismic isolation device (not shown) is mounted on a mounting base and fixed by bolts, and a similar seismic isolation base plate fixed to an upper building mounted on the upper surface of the seismic isolation device, as in the conventional example. The seismic isolation layer is formed by fixing the to the frame of the upper structure.

As described above, the method of constructing the base for mounting the seismic isolation device according to the present invention includes the step of adjusting a part of the fixing bolts selected from a plurality of fixing bolts screwed to one surface of the seismic isolation device mounting part to the level adjustment support. As it is supported and fixed on a simple fixing plate on the foundation and the other fixing bolts are open from the foundation, it can be constructed simply using reduced members, and the productivity can be greatly improved .

Next, the base isolation base plate will be described. The seismic isolation base plate according to the present invention is basically provided with a screw hole for fixing the seismic isolation device on one side of the mounting portion of the seismic isolation device, and a plurality of fixing holes screwed to the screw holes on the opposite surface of the mounting portion. Bolts are deployed, and some of the fixing bolts are used as level adjustment pillars of the base isolation base plate for the foundation, and are manufactured at a low cost with a simple structure to achieve stable level adjustment and easy handling. . An embodiment of a base isolation base plate according to the present invention will be described below with reference to the drawings.

The base-isolated base plate 3 shown in FIGS.
A plurality of screw holes 11 for attaching the seismic isolation device are provided on one upper surface of the circular seismic isolation device mounting portion 10, and a screw hole 12 continuous with the screw hole 11 is provided on the opposite lower surface. Eight protruding pieces 13 to be provided are formed.
The mounting portion 10 and the protruding piece 13 may be formed separately from a plate material and a bar material and integrally formed by welding, or may be integrally formed by die casting. A fixing bolt 14 is screwed into the screw hole 12 of the projecting piece. The fixing bolt 14 is screwed with a retaining nut 16 and a retaining nut 17 for preventing the retaining nut 16 from strengthening the bonding force between the setting nut 15 and the cast concrete.

In the base isolation plate according to the present invention, a part of the plurality of anchor bolts is used as a level adjustment support for the base. The three fixing bolts at the position where 3 is fixed stably are used as the level adjustment support 6 for the base. A retaining nut 16 and a retaining nut 17 for preventing the retaining nut from loosening are attached to the level adjusting column 6 for enhancing the bonding force between the setting nut 15 and the cast concrete. The setting nut 15 is used for the level adjustment support 6.
This is used to fix the state after adjusting the length, and the setting of the level adjustment column 6 is determined by fastening with the protrusion 13. Such a function of the setting nut 15 is the same in other fixing bolts.

The other fixing bolts 14 are provided with the level adjusting posts 6.
Select a length that is free from the foundation when the base-isolated base plate 3 is placed on the foundation 1 by the level adjustment support 6 and screwed. It is fixed to the protruding piece 13 with the setting nut 15 thus set. A lower end of the fixing bolt 14 is screwed with a holding nut 16 for strengthening the bonding force with the cast concrete, and a locking stopper 17 is screwed on to hold and fix the fixing nut 16. The plurality of holes 18 provided inside the projecting piece 13 prevent air from being blocked between the base-isolated base plate 3 and the concrete when the concrete is poured into the lower part of the base-isolated base plate 3. It is a vent for air.

As described above, the seismic isolation base plate according to the present invention selects a part of the fixing bolts from a plurality of fixing bolts screwed to one surface of the seismic isolation device mounting portion to form a level adjusting support, Supporting and fixing to the above simple fixing plate, setting the position of the seismic isolation base plate, and other fixing bolts are open from the foundation, so to fix the rectangular anchor frame or anchor frame as before It eliminates the setup streaks, is manufactured at a low cost with a simple structure, and aims at the stability of level adjustment and the simplicity of handling in the construction method of the base for mounting the seismic isolation device.

In the above embodiment, the eight fixing bolts 14 screwed to the lower surface of the mounting portion 10 formed in a circular shape.
Of the seismic isolation base plate from within
Although the fixing bolts located above the points are used as the level adjusting posts 6 for the foundation, the selection of the level adjusting posts 6 is not limited to this. For example, square fixing bolts of the fixing bolts arranged in a square may be used. As in the case of selecting the level adjustment support, from the plurality of anchor bolts arranged in a polygon, fixation bolts located at three or more corners that stably anchor the base isolation base plate are used as the level adjustment support for the foundation. It is also possible.

The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various changes may be made without departing from the spirit of the present invention. Naturally, it is included in the invention.

[0031]

According to the first aspect of the present invention, there is provided a method for constructing a base for mounting a seismic isolation device, wherein a screw hole for fixing the seismic isolation device is provided on one surface of a mounting portion of the seismic isolation device and a plurality of holes are provided on the opposite surface of the mounting portion. In the construction method of the base for mounting the seismic isolation device, which fixes the seismic isolation base plate having the anchor bolts to the foundation and then casts concrete under the prescribed formwork, a plurality of anchors provided in the seismic isolation device mounting part are provided. Some of the bolts are used as level-adjusting columns for the base-isolated base plate, and the base-isolated base plate is directly fixed to the foundation, and the other fixing bolts are released from the foundation.This reduces the number of parts used and simplifies the level adjustment work. This has the effect of improving productivity for constructing the pedestal for mounting the seismic device.

The seismic isolation base plate according to the second aspect of the present invention is provided with a screw hole for fixing the seismic isolation device on one side of the seismic isolation device mounting portion, and a plurality of fixing bolts arranged on the opposite surface of the base plate. A part of the fixing bolts is used as a level adjustment support for the foundation and used in the method of constructing the base for mounting the seismic isolation device according to claim 1, so that it can be manufactured at a low cost with a simple structure and the number of members can be reduced. This has the effect of reducing the cost of the method of constructing the base for mounting the seismic isolation device.

According to a third aspect of the present invention, there is provided the seismic isolation base plate according to the second aspect, wherein the seismic isolation base plate includes a plurality of fixing bolts arranged in a circumferential shape and stably fixes the seismic isolation base plate. Since the fixing bolt positioned as described above is characterized by being used as a level-adjusting support for the foundation, it has the effect of stabilizing the level adjustment and simplifying the handling in addition to the above effects.

According to a fourth aspect of the present invention, there is provided the base-isolated base plate according to the second aspect, wherein the base-isolated base plate is a plurality of fixing bolts arranged in a polygon and has three or more points for stably fixing the base-isolated base plate. Is characterized in that the fixing bolts located at the corners are used as level adjustment columns with respect to the foundation, so that in addition to the above-mentioned effects, the effect of stabilizing the level adjustment and simplifying the handling is achieved.

[Brief description of the drawings]

FIG. 1 is a side view of a construction state showing a construction method of a base for mounting a seismic isolation device according to the present invention.

FIG. 2 is a plan view of a construction state showing a construction method of a base for mounting a seismic isolation device according to the present invention.

FIG. 3 is a partial side view of a construction state showing a construction method of a base for mounting a seismic isolation device according to the present invention.

FIG. 4 is a side view of the base isolation base plate according to the present invention.

FIG. 5 is a view of the base-isolated base plate according to the present invention as viewed in the direction indicated by an arrow (5) in FIG. 4;

FIG. 6 is a side view of a construction state showing a construction method of a conventional base for mounting a seismic isolation device.

FIG. 7 is a plan view of a construction state showing a construction method of a conventional base for mounting a seismic isolation device.

[Explanation of symbols]

1 foundation, 2 reinforcement of mounting base, 3 base-isolated base plate, 4 fixing plate, 5 anchor bolt, 6
Level adjustment support, 7 Seismic isolation device mounting base, 10 Seismic isolation device mounting section, 11 Seismic isolation device screw hole, 12 Screw hole, 13 Projection piece, 14 Fixing bolt, 15 Setting nut, 16 Holding nut, 17 Loose stop , 1
8 air vent hole, 30 foundation, 31 reinforcing bar for mounting base, 32 anchor frame, 33 base-isolating base plate, 34 mounting base for seismic isolation device, 35 seismic isolation device, 36 setup bar, 37 L-shaped angle material, 3
8 projecting pieces, 39 screw rods, 40 nuts,

Claims (4)

[Claims] 1. A method according to claim 1, further comprising: providing a screw hole for fixing the seismic isolation device on one surface of the seismic isolation device mounting portion, and fixing the seismic isolation base plate having a plurality of fixing bolts provided on the opposite surface of the mounting portion to the base. A method of installing a seismic isolation device mounting base for placing concrete under a predetermined formwork construction, wherein a part of a plurality of fixing bolts provided in a seismic isolation device mounting portion is used as a level adjustment support of a base isolation base plate. A method of constructing a base for mounting a seismic isolation device, wherein a base plate is directly fixed to a foundation and other fixing bolts are released from the foundation. 2. A seismic isolation device mounting part having a screw hole for fixing the seismic isolation device on one surface thereof, a plurality of fixing bolts disposed on the opposite surface of the mounting part, and a part of the plurality of fixing bolts. The seismic isolation base plate used in the method of constructing a base for mounting a seismic isolation device according to claim 1, wherein the base is a level adjusting support of the seismic isolation base plate with respect to the foundation. 3. The method according to claim 1, wherein a plurality of fixing bolts arranged circumferentially and located at three or more points for stably fixing the seismic isolation base plate are used as level adjustment columns of the seismic isolation base plate with respect to the foundation. Claim 2
Seismic isolation base plate described in. 4. A plurality of fixing bolts arranged in a polygon, the fixing bolts being located at three or more corners for stably fixing the seismic isolation base plate, are used as level adjustment columns of the seismic isolation base plate with respect to the foundation. The base-isolated base plate according to claim 2, wherein: